/Engine/Source/Runtime/Experimental/Chaos/Public/Chaos/TriangleMesh.h
Return the array of bending element indices {i0, i1, i2, i3}, with {i0, i1} the segment indices and {i2, i3} the cross segment indices.
[TArray](API\Runtime\Core\Containers\TArray)< [Chaos::TVec4](API\Runtime\ChaosCore\Chaos\TVec4)< int32 > > GetUniqueAdjacentElements() const